Was there a (relatively) clear divide that marked the start of the period? No.
Did they make most people's life mostly better? No. (Not a Rebirth)
Was the transition sharp? No, over 3 centuries. It was, quoting the video "A lot of mutually dependent thing that occurred over centuries". And it was not a Rebirth. It just continued changes that were already happening in the Mid-Late Medieval ages (urbanization, trade, etc)."
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